I looked at the SNR vs ISO/DIN performance of a couple of Sony cameras. How I made these curves is described here. As before, the way to use these curves is to find the ISO/DIN setting beyond which the Actual (red) line drops as fast as the 1.5 decibel/octave line. Beyond that point, for a… [Read More]
Archives for February 13, 2013
ETTR — just crank up the ISO? Part 4
I’ve refined the calculations behind the graphs in the first post of this series. Specifically, I’ve added normalization to the 1.5 dB/octave lines so that they are corrected for the actual exposure of the test images, as measured by the mean value of the pixels in the selection box. The Poisson-limited lines had already been… [Read More]